Kaiser High School parking lot, 511 Lunalilo Home Road, 4-7 p.m., free. Bring a plant, cutting or seed and take another in exchange. Bring empty pots or make a monetary donation if you don’t have plants of your own. Proceeds benefit the school. (auntie@eastoahu96825.com)

Pet Loss Support Group

Hawaiian Humane Society, 2700 Waialae Ave., 6:30-7:30 p.m., free. Those who have lost a beloved pet can find a network of people who understand. (hawaiianhumane.org)